Gitpod image integration test

This commit is purely to integration test newer versions of the GitPod
workspace image and not supposed to be merged.

Changelog: changed

.gitpod.yml

-image: registry.gitlab.com/gitlab-org/gitlab-development-kit/gitpod-workspace:stable
+image: registry.gitlab.com/gitlab-org/gitlab-development-kit/gitpod-workspace:main
 
 tasks: